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Prove that: sin^(-1)((12)/(13))+cos^(-1)...

Prove that: `sin^(-1)((12)/(13))+cos^(-1)(4/5)+tan^(-1)((63)/(16))=pi`

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`sin^(-1) (12/13) =x`

`sin x =12/13`

`cos x = 5/13`

`tan x = sin x/(cos x)`

`tan x =12/5`

similarly,

`cos y = 4/5`

`tan y = 3/4`

...
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